[PM-9483] Fix added Attachment from the Edit Cipher Screen on mobile apps can't be retrieved

[LRNcardozoWDF]

Type of change

• Bug fix
• New feature development
• Tech debt (refactoring, code cleanup, dependency upgrades, etc)
• Build/deploy pipeline (DevOps)
• Other

Objective

Ensure attachments that are added on edit cipher screen can be retrieved.

Code changes

• src/Core/Services/CipherService.cs: Although attachments added on edit cipher screen are updated on server, that state isn't applied to the cipher in memory. This ensures that the current cipher has the updated attachments.

Screenshots

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